With this knowledge, you can determine what melds they are attempting to create and decide which cards to keep or discard. An opponensattakigat may not be pursuing a run involving a 5 of diamonds, for example, if they discard that card. This lets you keep your own 5s without worrying about aiding them. Targeting "knocking" when you have a low point total in your hand is another crucial Gin Rummy tactic.
